The bar chart represents the annual income of families in the US in 2007,2011 and 2015.Overall two main tendencies can be observed. Firstly, low-income and wealthy families were predominant with mixed success during the period, and secondly, middle-income residential units were notably smaller than those above.
In 2007 rich families were dominant with 30 million people. Furthermore, the low-income families were slightly above 25 million. Meanwhile, middle-class families nearly half the size of the wealthy people residing in America. This figure remained he particularly the same over the years ,with only slightly difference 2011,suggesting a relatively stable economic distribution during this period.
The most noticeable change could be seen in 2015, when the total amount of well-off dwellings increased to nearly 33 million, demonstrating obvious upward trend. In contrast, others , like middle-income and economically disadvantaged groups persisted practically the same with margins 200 thousand to 500 thousand in the same years., illustrating minimal growth in these catagories.